US5507319A - Synthetic resin bellows pipe - Google Patents

Synthetic resin bellows pipe Download PDF

Info

Publication number
US5507319A
US5507319A US08/365,159 US36515994A US5507319A US 5507319 A US5507319 A US 5507319A US 36515994 A US36515994 A US 36515994A US 5507319 A US5507319 A US 5507319A
Authority
US
United States
Prior art keywords
wall
pipe
pipe wall
top portion
synthetic resin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US08/365,159
Other languages
English (en)
Inventor
Shiro Kanao
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US5507319A publication Critical patent/US5507319A/en
Assigned to KANAO, SHIGEKI, KANAO, CHIZUKO reassignment KANAO, SHIGEKI CONVEYANCE BY INHERITANCE Assignors: KANAO, SHIRO
Assigned to KANAO, SHIGEKI reassignment KANAO, SHIGEKI ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KANAO, CHIZUKO
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/0015—Making articles of indefinite length, e.g. corrugated tubes
    • B29C49/0021—Making articles of indefinite length, e.g. corrugated tubes using moulds or mould parts movable in a closed path, e.g. mounted on movable endless supports
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/0015—Making articles of indefinite length, e.g. corrugated tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/11—Hoses, i.e. flexible pipes made of rubber or flexible plastics with corrugated wall
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2009/00—Layered products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/18—Pleated or corrugated hoses

Definitions

  • the present invention relates to a bellows pipe made of synthetic resin, which is suitably used mainly for a drain pipe of a domestic washing machine and an air blowing pipe of a drier for drying futon mats.
  • bellows pipes of this type have been proposed and well known, in which the section of the pipe wall is formed to be substantially triangular, and one inclined wall can be made to be approximately parallel with the other inclined wall so that the bellows pipe can take a shortened posture, and this shortened posture can be maintained by itself.
  • a bellows pipe the thickness of which is small, that is, the thickness is about 1 mm or less, and the diameter of which is 30 to 40 mm.
  • This bellows pipe is already applied to an air blowing pipe of a futon mat drier for domestic use.
  • the present applicant has made an application for patent of this type bellows pipe used for a drain pipe of a domestic washing machine.
  • the example is shown in Japanese Unexamined Utility Model Publication No. Hei. 5-1486.
  • the present invention is to provide a pipe which is capable of preventing the occurrence of an accident, which tends to occur in the conventional synthetic resin bellows pipe, and further the durability of which is high. That is, the present invention is to provide a bellows pipe constructed in such a manner that the shortened posture is maintained, and the weight and the quantity of used material are not greatly increased.
  • the present invention provides a synthetic resin bellows pipe in which the section of a first pipe wall made of synthetic resin material is formed to be substantially triangular and one inclined wall approaches the other inclined wall while the inclined wall goes over a center line passing through a top of both the inclined walls forming the first pipe wall and the approaching posture is capable of being maintained by itself, characterized in that: a second pipe wall, the wall thickness of which is smaller than that of the first pipe wall, is integrally connected with the inside of the first pipe wall; the section of the second pipe wall is substantially triangular; a bottom of the second pipe wall and predetermined portions of both the inclined walls of the second pipe wall at the bottom side adhere to a bottom of the first pipe wall and both the inclined walls; and a small space is formed between a top of the second pipe wall and the top of the first pipe wall.
  • the length of an adhesive portion at the bottom side in which both the inclined walls of the first pipe wall (main pipe wall) adhere onto both the inclined walls of the second pipe wall 11, is preferably in a range from one half to nine tenths of the length of both the inclined walls of the first pipe wall.
  • Both the first and second pipe walls may be adhered to each other by means of fusion or adhesion, and appropriate means may be adopted.
  • the wall thickness of the main pipe wall may be appropriately determined in accordance with the object of the use of the pipe.
  • the wall thickness of the second wall may be appropriately determined so that the main pipe wall can be smoothly changed between the extended and shortened postures and further the extended and shortened postures can be maintained by the pipe itself. In this case, it is necessary that the wall thickness of the second pipe wall is smaller than that of the main pipe wall.
  • both materials for forming the main (first) pipe wall and the second pipe wall are made to be a pipe-shape, and then a pipe provided with annular corrugation or spiral corrugation is formed by means of blow formation or vacuum formation, or by means in which the blow formation and vacuum formation are combined.
  • the other is a method in which a belt-shaped material is spirally wound, and side edges are overlapped and adhered so that a pipe provided with spiral corrugation can be formed.
  • the pipe of the present invention can be manufactured by any of the means described above.
  • the top, bottom or a portion close to the top or bottom can be easily made to be thin. Accordingly, this thin portion can be made to be an oscillating fulcrum at which the pipe wall is bent in the case of a change between the extended and shortened postures.
  • the synthetic resin bellows pipe of the present invention is constructed in the manner described above. Therefore, when the pipe is stored or transported, the pipe is pushed and compressed in the axial direction, and the inclined walls on one side are moved toward the inclined walls on the other side, so that the inclined walls goes over the center line which passes through the top portion of the pipe wall. In this way, the pipe is put into a condition in which the pipe length is shortened. When the pipe is placed into this shortened condition, even if the pushing force is released, the pipe is maintained in the shortened condition. The pipe is stored and transported as described above.
  • both ends or one end of the pipe is temporarily held and the pipe is pulled in the axial direction, so that the inclined walls on one side are separated from the inclined walls on the other side, wherein the inclined walls go over the center line.
  • the inclined walls are returned to the initial extended positions so that the inclination angles of the inclined walls on one side can be different from those of the inclination walls on the other side.
  • the pipe that has been put into the extended condition may be used in the same manner as that of a conventional pipe. Also, it is possible to use the pipe in such a manner that one portion of the pipe wall is put into the shortened condition and the other portion is put into the extended condition. When necessary, a bending force may be applied to the pipe, so that the small diameter side is put into the shortened condition and the large diameter side is put into the extended condition. In this way, the pipe may be used in a bent condition.
  • the length of the synthetic resin bellows pipe of the present invention is capable of being reduced at least to a half of the length of the pipe in the extended condition. Accordingly, the storage and transportation expenses can be greatly reduced. Further, even when the main pipe wall is damaged by abrasion or other accidents, the leak of fluid from the inside to the outside of the pipe can be stopped by the second pipe wall. Therefore, the pipe can be successively used without any problems. Since the space S is formed between the top portion of the main pipe wall and the top portion of the second pipe wall, there is no possibility that the second pipe wall is damaged simultaneously with the main pipe wall. Even if, the main pipe wall is damaged, the second pipe wall is still protected by the main pipe wall. Therefore, it is possible that the pipe is used over a long period of time, and the durable length of time can be greatly enhanced.
  • FIG. 1 is a partially exploded front view of the pipe of a first embodiment
  • FIG. 2A is a sectional view of the extended posture of the pipe walls of the first embodiment
  • FIG. 2B is an enlarged view of a portion of the two pipe walls of FIG. 2A,
  • FIG. 3 is a sectional view of the shortened posture of the pipe walls of the first embodiment
  • FIG. 4 is a sectional view showing the primary portion of a manufacturing apparatus
  • FIG. 5A is a sectional view of the extended posture of the pipe walls of a second embodiment
  • FIG. 5B is an enlarged view of a portion of the two pipe walls of FIG. 5A.
  • FIG. 6 is a sectional view of the shortened posture of the pipe walls of the second embodiment.
  • FIGS. 1 to 3 are views showing a pipe according to a first embodiment of the present invention.
  • FIG. 1 is a partially exploded overall arrangement view of the pipe suitable for use as drain pipe A of an electric washing machine, the section of the pipe wall 1 of which is triangular.
  • FIG. 2A is a view showing the extended posture of the pipe
  • FIG. 2B is an enlarged view of a portion of the two pipe walls
  • FIG. 3 is a view showing the shortened posture of the pipe.
  • the synthetic bellows pipe A of this embodiment is made of polypropylene (PP).
  • PP polypropylene
  • the section of the main pipe wall 1 is constructed in the following manner. Concerning inclined walls 2 and 3 adjacent to each other, the length of one inclined wall 2 is a little longer than that of the other inclined wall 3, and the inclination angle of the inclined wall 2 is gentler than that of the inclined wall 3. In this way, the inclined walls 2 and 3 are formed to be triangular. As shown in FIG. 3, one inclined wall 3 moves 20 toward the other inclined wall 2 while the inclined wall 3 goes over the center line l which passes through a top portion 4, so that the inclined wall 3 approaches the inclined wall 2. This approaching posture is capable of being maintained by the pipe wall itself.
  • the average wall thickness of the inclination wall is approximately 1 mm.
  • a second pipe wall 11 Inside the main pipe wall 1, there is provided a second pipe wall 11, the average wall thickness of which is approximately 0.5 mm which is thinner than the main pipe wall 1, wherein the second pipe wall 11 is also made of polypropylene (PP) and the section is formed to be triangular.
  • PP polypropylene
  • a bottom 15 and portions of both inclined walls 12 and 13 at the bottom side, the lengths of the portions are approximately two thirds of the inclined walls 12 and 13, are fused with the bottom 5 and both the inclined walls 2 and 3, and a portion located at the top side with respect to this fusing portion is maintained in a non-adhesive condition.
  • a small space S is formed between the top 14 of the second pipe wall 11 and the top 4 of the main pipe wall 1.
  • the thus obtained pipe A is constructed in the following manner. Sections of both the main pipe wall 1 and the second pipe wall 11 are substantially triangular, and both the inclined walls 2 and 3 composing the main pipe wall 1 are connected with each other and formed into a V-shape at the top 4 and the bottom 5, and the inclined walls 2 and 3 are bent and swung at the fulcrums of the top 4 and bottom 5. As illustrated in FIG. 2, the opening angle ⁇ of the inclined wall 2 located on the left with respect to the center line l passing through the top 4 in the circumferential direction in FIG. 2 is formed to be a little larger than the opening angle ⁇ of the inclined wall 3 located on the right in FIG. 2A.
  • the length of one inclined wall 2 is constructed to be a little longer than the length of the other inclined wall 3.
  • the pipe A shown in this embodiment is constructed so that it can be applied to a drain pipe of an electric washing machine. Accordingly, as illustrated in FIG. 1, cylindrical portions 20 are integrally provided at both ends of the pipe body. Also in these cylindrical portions, the second pipe wall 22 is fused onto the inside of the main pipe wall 21. The pipe A constructed in the above manner is pushed and compressed in the axial direction so that it can be put into the shortened posture when it is stored or transported.
  • FIG. 4 is a schematic illustration of the manufacturing apparatus in which a means for manufacturing the pipe A is shown.
  • the basic type of this apparatus is generally known as a caterpillar type blow molding machine.
  • the apparatus of this example is composed in the following manner.
  • a cylindrical nozzle 30 is protruded from the fore end side of a synthetic resin extruder (not shown in the drawing).
  • a first nozzle 31, second nozzle 32 and cooling cylinder 33 are arranged from the base end side in this order, and a large number of metallic blocks 40 connected with each other in a caterpillar-shape are arranged around the aforementioned units so that the units are surrounded by the metallic blocks 40.
  • first material passage 34 In the first nozzle 31, there are provided a first material passage 34, first compressed gas passage 35, second material passage 36 and second compressed gas passage 37 from the outer to the inner circumferential side, wherein these units are formed to pass through in the axial direction. Between the first and second nozzles 31 and 32, there is provided a first space 38, and between the second nozzle 32 and the cooling cylinder 33, there is provided a second space 39.
  • the first material passage 34 and the first compressed gas passage 35 are open to the first space 38, and the second material passage 36 and the second compressed gas passage 37 are open to the second space 39.
  • Material “p” composing the main pipe wall 1 passes through the first material passage 34 and is extruded in a tube-shape from an end face 31a of the first nozzle 31 to the first space 38. Then material “p” is expanded along the metallic mold surface of the metallic mold block 40 by the pressure of gas “a” passing through the first compressed gas passage 35 and injected into the first space 38. Then material “p” successively moves from the first space 38 to the second nozzle 32 side. Next, material “q” composing the second pipe wall 11 passes through the second material passage 36 and is extruded in a tube-shape from an end face 32a of the second nozzle 32 to the second space 39.
  • FIGS. 5A, 5B and 6 are views of a second embodiment corresponding to FIGS. 2A, 2B and 3 of the first embodiment described before.
  • the section of pipe A of this second embodiment is composed in the following manner. Instead of the V-shape of the top portion 4 in the substantially triangular section of the pipe shown in the first embodiment, a small arc 4a is provided at the top portion. Due to this structure, the posture of the pipe A can be more easily changed between the extended and shortened postures, and at the same time, a distance in the circumferential direction of the space S (see especially FIG. 5B) between this arc portion 4a and the top portion 14 of the second pipe wall 11 can be maintained to be large, so that the second pipe wall 11 is not affected when the main pipe wall 1 has been damaged.
  • the embodiments of the present invention are described in the case where the pipe A is formed by the blow molding means.
  • the present invention is not limited to the specific means, and a belt-shaped material may be used and wound spirally so that the edges are overlapped and adhered. In this way, a pipe having spiral corrugation can be provided.
  • Material used for composing the pipe walls I and 11 is not limited to polypropylene (PP) exemplified in the explanation of the embodiments of the present invention.
  • PP polypropylene
  • the main pipe wall 1 may be made of PP material
  • the second pipe wall 11 may be made of a mixed material in which 10 to 40 weight percent of EPT (rubber) is added to PP.
  • EPT EPT
  • material may be arbitrarily selected.
  • the pipe walls 1 and 11 are changed between the extended and shortened postures, it is preferable to select a material which is less susceptible to the occurrence of cracks at the bending fulcrums.
  • the pipe A described in the present invention is not limited to the drain pipe of an electric washing machine and the air blowing pipe of a futon drier, but the pipe A may be applied to all arbitrary pipes.
  • the present invention is not limited to the specific embodiments.
  • the wall thickness of one inclined wall 2 may be different from the wall thickness of the other inclined wall 3. That is, variations, modifications and elimination of parts may be made therein within the scope that the structure described above is provided, the objects of the present invention can be attained, and the effects described below can be obtained.
  • the pipe of the present invention is made of synthetic resin, and the section of the pipe wall is formed to be substantially triangular, and one inclined wall moves and approaches the other inclined wall while the inclined wall goes over the center line passing through the top portion formed by the inclined walls adjacent to each other, and the approaching posture can be maintained by the pipe wall itself.
  • the second pipe wall the wall thickness of which is smaller than that of the aforementioned pipe wall, is integrally connected with the inside of the wall.
  • the section of the second pipe wall is formed to be substantially triangular, and the bottom and a predetermined length of the portions of the inclined walls at the bottom side of the second pipe wall are adhered to the bottom and the inclined walls of the aforementioned pipe wall, so that the space S is formed between the top portion of the second pipe wall and the top portion of the aforementioned pipe wall.
  • the space S is formed between the top portion of the outside pipe wall and the top portion of the second pipe wall, there is no possibility that the second pipe wall is damaged simultaneously with the outside pipe wall. Even if the outside pipe wall is damaged, the second pipe wall is still protected by the outside pipe wall. Therefore, it is possible that the pipe is used over a long period of time, and the durable length of time can be greatly enhanced.
  • the pipe of the present invention provides the aforementioned effects, the second pipe wall is thin, so that a large quantity of material is not required for manufacturing the pipe, and the increase of weight can be avoided. Further, when the pipe is stored or transported, the length of the pipe can be reduced to a half of the length of the extended posture or less. Therefore, the storage and transport expenses can be greatly reduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Laminated Bodies (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
US08/365,159 1993-12-28 1994-12-28 Synthetic resin bellows pipe Expired - Fee Related US5507319A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP05353955A JP3122744B2 (ja) 1993-12-28 1993-12-28 合成樹脂蛇腹管
JP5-353955 1993-12-28

Publications (1)

Publication Number Publication Date
US5507319A true US5507319A (en) 1996-04-16

Family

ID=18434344

Family Applications (1)

Application Number Title Priority Date Filing Date
US08/365,159 Expired - Fee Related US5507319A (en) 1993-12-28 1994-12-28 Synthetic resin bellows pipe

Country Status (4)

Country Link
US (1) US5507319A (ja)
JP (1) JP3122744B2 (ja)
KR (1) KR100337284B1 (ja)
MY (1) MY116485A (ja)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5704401A (en) * 1995-04-12 1998-01-06 Totaku Industries, Inc. Washing machine hose
US6041825A (en) * 1996-03-07 2000-03-28 Gutter World, Inc. Repositionable flexible downspout extension
WO2000018286A1 (en) * 1998-09-30 2000-04-06 Headwaters Research & Development, Inc. Multi-purpose attachment tool for a hand-held vacuum cleaner
US6223777B1 (en) 1996-03-07 2001-05-01 Gutter World, Inc. Repositionable, flexible, and extendible connector
US6398266B1 (en) 1999-09-22 2002-06-04 Ballard Medical Products Collapse resistant popoid connector
USD466607S1 (en) 2001-08-27 2002-12-03 Kimberly-Clark Worldwide, Inc. Flexible connector
USD473941S1 (en) 2001-08-27 2003-04-29 Kimberly-Clark Worldwide, Inc. Flexible connecting device
USD476731S1 (en) 2001-08-27 2003-07-01 Kimberly-Clark Worldwide, Inc. Bendable connector
US20040007278A1 (en) * 2002-06-06 2004-01-15 Williams Robert M. Flexible conduit and method for forming the same
USD486909S1 (en) 2001-08-27 2004-02-17 Kimberly-Clark Worldwide, Inc. Bendable connecting device
US20040226623A1 (en) * 1999-10-12 2004-11-18 Oem/Miller, A Division Of Holm Industries Dual wall co-extruded corrugated tubing
GB2382821B (en) * 2001-07-28 2005-07-27 John Herbert North Washing machine casing mounting
US20060201568A1 (en) * 2002-11-18 2006-09-14 Henry Petersen Flexible, tubular device e.g. a bellows
US20070051417A1 (en) * 2005-09-08 2007-03-08 Cleveland Tubing, Inc. Portable flexible and extendable drain pipe
US20090032131A1 (en) * 2005-09-08 2009-02-05 Boettner E Michael Flexible and Extendable Hose for Holding Tank Drainage
US20150267853A1 (en) * 2014-03-18 2015-09-24 G.B.D. Corp. Expansion compensator with multiple layers with differing stiffness
US20160363242A1 (en) * 2015-02-12 2016-12-15 Den Di De Nora Paolo Extensible hose
US10697575B2 (en) 2014-06-26 2020-06-30 Omachron Intellectual Property Inc. Expansion compensator
USD903065S1 (en) * 2017-04-10 2020-11-24 Omnimax International, Inc. Pipe with alternating sections
USD916467S1 (en) * 2019-04-11 2021-04-20 Sang Geun Lee Interdental brush
US11326724B2 (en) 2017-04-10 2022-05-10 Omnimax International, Llc Pipe with alternating sections

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5076371B2 (ja) * 2006-06-14 2012-11-21 東洋紡績株式会社 伸縮可能な蛇腹形状を有する医療用ゴミ箱
JP2008201511A (ja) * 2007-02-19 2008-09-04 Toyobo Co Ltd 蛇腹形状熱可塑性樹脂構造体、及びそれを用いた容器、並びにチューブ
KR101587872B1 (ko) 2014-08-27 2016-01-22 국방과학연구소 고온 환경에 적용 가능한 벨로우즈

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3090403A (en) * 1962-02-09 1963-05-21 Sealol Laminated metallic bellows
US3201861A (en) * 1960-03-31 1965-08-24 Fromson H A Method of making a double-walled tube
US4081190A (en) * 1975-02-20 1978-03-28 Daniel Itzler Plumbing device
US4415764A (en) * 1980-11-12 1983-11-15 Societa' Cavi Pirelli S.P.A. Submarine electric cable with tubular stiffening means and method of applying the stiffening means
US4424834A (en) * 1982-09-22 1984-01-10 Kyoraku Co., Ltd. Elastic shaped article
US4773458A (en) * 1986-10-08 1988-09-27 William Touzani Collapsible hollow articles with improved latching and dispensing configurations
US4852564A (en) * 1984-06-28 1989-08-01 Sheridan Catheter Corp. Flexible connectors for medico-surgical tubes
US4921147A (en) * 1989-02-06 1990-05-01 Michel Poirier Pouring spout
JPH051486A (ja) * 1991-06-25 1993-01-08 Matsushita Electric Works Ltd 間仕切りパネルの閉塞装置
US5311753A (en) * 1991-06-19 1994-05-17 Shiro Kanao Drain hose for washing machine and which includes a corrugated intermediate portion

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3201861A (en) * 1960-03-31 1965-08-24 Fromson H A Method of making a double-walled tube
US3090403A (en) * 1962-02-09 1963-05-21 Sealol Laminated metallic bellows
US4081190A (en) * 1975-02-20 1978-03-28 Daniel Itzler Plumbing device
US4415764A (en) * 1980-11-12 1983-11-15 Societa' Cavi Pirelli S.P.A. Submarine electric cable with tubular stiffening means and method of applying the stiffening means
US4424834A (en) * 1982-09-22 1984-01-10 Kyoraku Co., Ltd. Elastic shaped article
US4852564A (en) * 1984-06-28 1989-08-01 Sheridan Catheter Corp. Flexible connectors for medico-surgical tubes
US4773458A (en) * 1986-10-08 1988-09-27 William Touzani Collapsible hollow articles with improved latching and dispensing configurations
US4921147A (en) * 1989-02-06 1990-05-01 Michel Poirier Pouring spout
US5311753A (en) * 1991-06-19 1994-05-17 Shiro Kanao Drain hose for washing machine and which includes a corrugated intermediate portion
JPH051486A (ja) * 1991-06-25 1993-01-08 Matsushita Electric Works Ltd 間仕切りパネルの閉塞装置

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5704401A (en) * 1995-04-12 1998-01-06 Totaku Industries, Inc. Washing machine hose
US6041825A (en) * 1996-03-07 2000-03-28 Gutter World, Inc. Repositionable flexible downspout extension
US6223777B1 (en) 1996-03-07 2001-05-01 Gutter World, Inc. Repositionable, flexible, and extendible connector
WO2000018286A1 (en) * 1998-09-30 2000-04-06 Headwaters Research & Development, Inc. Multi-purpose attachment tool for a hand-held vacuum cleaner
GB2363060A (en) * 1998-09-30 2001-12-12 Headwaters Res & Dev Inc Multi-purpose attachment tool for a hand-held vacuum cleaner
US6398266B1 (en) 1999-09-22 2002-06-04 Ballard Medical Products Collapse resistant popoid connector
US20040226623A1 (en) * 1999-10-12 2004-11-18 Oem/Miller, A Division Of Holm Industries Dual wall co-extruded corrugated tubing
US20060225803A1 (en) * 1999-10-12 2006-10-12 Chenoweth Kenneth R Dual wall co-extruded corrugated tubing
GB2382821B (en) * 2001-07-28 2005-07-27 John Herbert North Washing machine casing mounting
USD473941S1 (en) 2001-08-27 2003-04-29 Kimberly-Clark Worldwide, Inc. Flexible connecting device
USD476731S1 (en) 2001-08-27 2003-07-01 Kimberly-Clark Worldwide, Inc. Bendable connector
USD466607S1 (en) 2001-08-27 2002-12-03 Kimberly-Clark Worldwide, Inc. Flexible connector
USD486909S1 (en) 2001-08-27 2004-02-17 Kimberly-Clark Worldwide, Inc. Bendable connecting device
US20040007278A1 (en) * 2002-06-06 2004-01-15 Williams Robert M. Flexible conduit and method for forming the same
US7334609B2 (en) * 2002-11-18 2008-02-26 Norsk Hydro Asa Flexible tubular device
US20060201568A1 (en) * 2002-11-18 2006-09-14 Henry Petersen Flexible, tubular device e.g. a bellows
US7597119B2 (en) * 2005-09-08 2009-10-06 Boettner E Michael Flexible and extendable hose for holding tank drainage
US20090032131A1 (en) * 2005-09-08 2009-02-05 Boettner E Michael Flexible and Extendable Hose for Holding Tank Drainage
US20070051417A1 (en) * 2005-09-08 2007-03-08 Cleveland Tubing, Inc. Portable flexible and extendable drain pipe
US7677271B2 (en) * 2005-09-08 2010-03-16 Cleveland Tubing Inc. Portable flexible and extendable drain pipe
US20100170589A1 (en) * 2005-09-08 2010-07-08 Boettner E Michael Portable Flexible and Extendable Drain Pipe
US20150267853A1 (en) * 2014-03-18 2015-09-24 G.B.D. Corp. Expansion compensator with multiple layers with differing stiffness
US9822916B2 (en) * 2014-03-18 2017-11-21 Omachron Intellectual Property Inc. Expansion compensator with multiple layers with differing stiffness
US10697575B2 (en) 2014-06-26 2020-06-30 Omachron Intellectual Property Inc. Expansion compensator
US20160363242A1 (en) * 2015-02-12 2016-12-15 Den Di De Nora Paolo Extensible hose
US10563796B2 (en) * 2015-02-12 2020-02-18 Den Di De Nora Paolo Extensible hose
USD903065S1 (en) * 2017-04-10 2020-11-24 Omnimax International, Inc. Pipe with alternating sections
US11326724B2 (en) 2017-04-10 2022-05-10 Omnimax International, Llc Pipe with alternating sections
USD916467S1 (en) * 2019-04-11 2021-04-20 Sang Geun Lee Interdental brush

Also Published As

Publication number Publication date
KR100337284B1 (ko) 2002-11-23
KR950019338A (ko) 1995-07-22
MY116485A (en) 2004-02-28
JPH07195593A (ja) 1995-08-01
JP3122744B2 (ja) 2001-01-09

Similar Documents

Publication Publication Date Title
US5507319A (en) Synthetic resin bellows pipe
US4907957A (en) Molding apparatus for forming a parison and product of differing materials
US5894865A (en) Flexible hose construction and method of making the same
US5279333A (en) Flexible hose construction
AU639266B2 (en) Flexible hose construction and method of making the same
US4800928A (en) Flexible pipe
US3296047A (en) Method of producing reinforced flexible hose
JPH022031B2 (ja)
US4375381A (en) Two piece extruded hose
US3189053A (en) Flexible hose
US4182019A (en) Method for making corrugated hose
JP2634393B2 (ja) 推進工法用プラスチックス螺旋巻き二重管及びその製造法
US5275208A (en) Flexible hose construction and method of making the same
US3297055A (en) Hoses of synthetic plastic material
CN210240810U (zh) 高耐磨复合增强聚乙烯结构壁缠绕管
WO1999015326A1 (en) Improved flexible hose construction and method of making same
JP3407048B2 (ja) 耐圧合成樹脂管
KR100311687B1 (ko) 지중매설용 합성수지관 및 그의 제조방법
JP3297723B2 (ja) 硬質合成樹脂管とその製造方法
CN218294780U (zh) 一种大口径纳米改性聚乙烯mupe缠绕加筋管
JPS6028584Y2 (ja) 耐摩耗性ホ−ス
KR200270013Y1 (ko) 마름모꼴 보강구조를 갖는 합성수지관
KR100675822B1 (ko) 나선형 호스
JPS6022238B2 (ja) 可撓性良好な強化ガス用ゴム管及びその製造法
JPH01105729A (ja) プラスチックス螺旋巻き二重管の製造法

Legal Events

Date Code Title Description
FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

AS Assignment

Owner name: KANAO, SHIGEKI, JAPAN

Free format text: CONVEYANCE BY INHERITANCE;ASSIGNOR:KANAO, SHIRO;REEL/FRAME:010206/0408

Effective date: 19950514

Owner name: KANAO, CHIZUKO, JAPAN

Free format text: CONVEYANCE BY INHERITANCE;ASSIGNOR:KANAO, SHIRO;REEL/FRAME:010206/0408

Effective date: 19950514

FPAY Fee payment

Year of fee payment: 4

AS Assignment

Owner name: KANAO, SHIGEKI, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KANAO, CHIZUKO;REEL/FRAME:010628/0438

Effective date: 20000111

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
FP Lapsed due to failure to pay maintenance fee

Effective date: 20040416

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362